@article{JOLT_2017_27_4_a14,
     author = {Michael Murray and David M. Roberts and Christoph Wockel},
     title = {Quasi-Periodic {Paths} and a {String} {2-Group} {Model} from the {Free} {Loop} {Group}},
     journal = {Journal of Lie Theory},
     pages = {1151--1177},
     year = {2017},
     volume = {27},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2017_27_4_a14/}
}